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Objective <p>The primary aim of this study was to develop and evaluate a&#xa0;method for measuring anteroposterior (AP) translation in the glenohumeral joint using functional magnetic resonance imaging (fMRI).</p> Materials and methods <p>This study examined 30&#xa0;patients with traumatic ventral shoulder dislocation before their surgical treatment (dislocation group, LG). The comparison group (VG) consisted of 30&#xa0;subjects without relevant previous illness. Constant and Rowe scores as well as dynamic imaging of shoulder rotation in open MRI were performed. The AP translation was measured as the distance between the center of the humeral head and the center of the glenoid perpendicular to the glenoid plane. Glenoid length, Hill–Sachs defect (HSD), Hill–Sachs interval (HSI), and HSI engagement were also determined.</p> Results <p>On average, the VG achieved significantly higher values in the Constant (VG: 96.6 ± 4.2&#xa0;points; LP: 82.8 ± 12.6 points) and Rowe scores (VG: 98.5 ± 4.9&#xa0;points; LG: 72.9 ± 20.9 points) than the LG (<i>p</i> &lt; 0.001). On average, the humeral head of the VG (0.4 mm ± 1.0 mm [neutral rotation = NN], 0.0 mm ± 1.2 mm [max. internal rotation = IRO], 0.0 mm ± 1.3 mm [20° external rotation = ARO], −0.6 mm ± 0.9 mm [40° ARO], −1.0 mm ± 1.8 mm [max. ARO]) was not significantly further posterior than that of the LG (−0.1 mm ± 1.1 mm [NN], −0.7 mm ± 1.3 mm [max. IRO], −0.2 mm ± 1.2 mm [20° ARO], −0.6 mm ± 1.0 mm [40° ARO], −1.3 mm ± 1.3 mm [max. ARO]). The LG achieved reduced values in ARO (VG 57.3°; LG 47.8°; <i>p</i> = 0.01). The engagement in maximum ARO was 32% ± 16% on average.</p> Conclusion <p>The measurement method described enables reliable and reproducible determination of translation in the glenohumeral joint over the entire rotation without any relevant technical effort. A&#xa0;clinically relevant difference in translation between the LG and VG could not be described.</p>

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Dynamische Bildgebung der Schulter in der funktionellen Magnetresonanztomographie

  • 期刊论文

  • 发表日期：

    2025年5月8日

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  • Moritz Koch,
  • Svenja Koch,
  • Jochen Huth,
  • Frieder Mauch

摘要

Objective

The primary aim of this study was to develop and evaluate a method for measuring anteroposterior (AP) translation in the glenohumeral joint using functional magnetic resonance imaging (fMRI).

Materials and methods

This study examined 30 patients with traumatic ventral shoulder dislocation before their surgical treatment (dislocation group, LG). The comparison group (VG) consisted of 30 subjects without relevant previous illness. Constant and Rowe scores as well as dynamic imaging of shoulder rotation in open MRI were performed. The AP translation was measured as the distance between the center of the humeral head and the center of the glenoid perpendicular to the glenoid plane. Glenoid length, Hill–Sachs defect (HSD), Hill–Sachs interval (HSI), and HSI engagement were also determined.

Results

On average, the VG achieved significantly higher values in the Constant (VG: 96.6 ± 4.2 points; LP: 82.8 ± 12.6 points) and Rowe scores (VG: 98.5 ± 4.9 points; LG: 72.9 ± 20.9 points) than the LG (p < 0.001). On average, the humeral head of the VG (0.4 mm ± 1.0 mm [neutral rotation = NN], 0.0 mm ± 1.2 mm [max. internal rotation = IRO], 0.0 mm ± 1.3 mm [20° external rotation = ARO], −0.6 mm ± 0.9 mm [40° ARO], −1.0 mm ± 1.8 mm [max. ARO]) was not significantly further posterior than that of the LG (−0.1 mm ± 1.1 mm [NN], −0.7 mm ± 1.3 mm [max. IRO], −0.2 mm ± 1.2 mm [20° ARO], −0.6 mm ± 1.0 mm [40° ARO], −1.3 mm ± 1.3 mm [max. ARO]). The LG achieved reduced values in ARO (VG 57.3°; LG 47.8°; p = 0.01). The engagement in maximum ARO was 32% ± 16% on average.

Conclusion

The measurement method described enables reliable and reproducible determination of translation in the glenohumeral joint over the entire rotation without any relevant technical effort. A clinically relevant difference in translation between the LG and VG could not be described.